First, let's mention the positives:
Very good key feel, which are almost silent. The "click" is hardly heard at all and you only hear the key "bottoming out" if you press it hard.
The round knob for volume control is worth every penny. You can also click it. However, the click only turns it on or off. I would prefer it to do mute / unmute.
The independent multimedia keys are good, although I find spacebar easier for pause / resume.
There are many preset settings for the illuminated keys.
It is heavy and does not move easily by accident.
The feet give a sense of quality and are a big difference from simple keyboards.
There is also software (which you need to download) to make the settings easier.
Now let's go to the negatives:
The coloring of the keys is fixed and does not change. That is, there are zones with specific colors, giving a multicolored effect. Personally, I bought it for the illuminated and mechanical keys. I expected there to be a setting to make all the keys the same color. But as we said, the color does not change. I don't like that. I consider it a decoration for a Christmas tree (or circus or carnival or whatever you want to call it). That's why I give it 3 stars.
For those who don't mind having a multicolored keyboard, it is a very good and economical choice.
If I had known, I would have spent (much) more money to buy another one, provided it could be monochrome, had volume keys, and if possible, an independent key for the calculator (here it is available as a combination of 2 keys).
UPDATE: After about a year, I have the following to say:
Typing in general, I can say, does NOT suit me. And that's because many times I press two keys together. Of course, this may be due to my "inexperience," but with good quality membrane keyboards (old Microsoft or Dell), I had no problem.
At some point, after 9-10 months of use, the "A" key started repeating and displaying many "A"s on the screen, even though I pressed it momentarily. Obviously, the switch "gave up the ghost." To deal with the problem, I had to greatly increase the repeat delay in the Windows settings. Maybe it's easy to change, I don't know, but I won't bother.
The biggest problem, however, is what I mentioned above, that the coloring of the keys does not change and is multicolored. It is really ugly. At night, though, it is visible.